// print a Mat:
System.out.println(mat.dump())
// or, maybe, only a small part of it:
System.out.println(mat.submat(5,15,5,15).dump())
// sometimes, the mean of a roi is useful:
System.out.println(mean(mat.submat(5,15,5,15)))

// or, maybe, only a small part of it:
System.out.println(mat.submat(5,15,5,15).dump())
// sometimes, the mean of a roi is useful:
System.out.println(mean(mat.submat(5,15,5,15)))
System.out.println(Core.mean(mat.submat(5,15,5,15)))

// print a Mat:
System.out.println(mat.dump())
// or, maybe, only a small part of it:
System.out.println(mat.submat(5,15,5,15).dump())
// sometimes, the mean of a roi is useful:
System.out.println(Core.mean(mat.submat(5,15,5,15)))